go back and look at my taxes. i do pay. >> scoff law. >> you're a total liar. go back and look at my taxes. >> the irs have already audited me twice in the last 12 years. >> by the end of the show he will have a problem with the faa and the irs. are you sure you want to co-op it going? >> right. >> sec is next. >> right. >> the suspect in last week's boston marathon bombings now responding thankfully to investigators's questions making a dramatic turn for law enforcement officials definitely trying to piece together what was behind the attack and answer the all important question of why. scott cohn is in boston and the latest on the investigation. scott, it looks like the suspect cannot speak because of a gunshot wound to the neck, which sounds like, according to various reports, was likely self inflicted. >> that's right, brian. we're hearing that most of those responses from dzhokhar tsarnaev are in writing. it could be this morning we see the formal criminal charges. and the fact that they took time to put this